Five choline-based amino acid ionic liquids ([Cho][AA]s) are prepared by neutralization between choline hydroxide and amino acids with different molecular weight and alkalinity. Solubility of CO₂ in 30 wt% aqueous solutions of these five [Cho][AA]s has been measured at temperatures from 303.15 to 333.15 K and pressures up to 7 bar. Based on the zwitterion mechanism, the solubility of CO₂ in aqueous [Cho][AA]s solutions is correlated with a reaction equilibrium thermodynamic model (RETM). The corresponding thermodynamic parameters, such as Henry’s law constants, reaction equilibrium constants, and enthalpy of physical dissolution and chemical reaction are all calculated and compared to evaluate the CO₂ absorption performance in aqueous solutions of five [Cho][AA]s. Meanwhile, the recyclability of the aqueous solution with 30 wt% [Cho][Lys] has been also investigated.

通过在氢氧化胆碱和具有不同分子量和碱度的氨基酸之间进行中和来制备五种基于胆碱的氨基酸离子液体（CHO）。已经在303.15至333.15 K的温度和最高7巴的压力下测量了CO ₂在这五种[AA]的30 wt％水溶液中的溶解度。基于两性离子机理，CO ₂在[AA] s水溶液中的溶解度与反应平衡热力学模型（RETM）相关。计算并比较了相应的热力学参数，例如亨利定律常数，反应平衡常数以及物理溶解和化学反应的焓，以评估CO _2。水溶液在5茶[AA]中的吸收性能。同时，还研究了具有30重量％的Cho [Lys]的水溶液的可回收性。